"We're deeply concerned that Trump is again trying to interfere with the Trump-Russia investigation by forcing Sessions' resignation", Hess said.
Trump announced in a tweet that Sessions's chief of staff Matt Whitaker would become the new acting attorney general. "A permanent replacement will be nominated at a later date", Trump said in a follow up post on Twitter. The Justice Department on Wednesday indicated that Whitaker would indeed supervise the Mueller investigation.
Trump had frequently and publicly expressed his anger at Sessions for recusing himself from the Mueller investigation, allowing its responsibility to fall to Rosenstein.
Some Democrats also considered Sessions too eager to do Trump's bidding and overly receptive to his grievances. In recusing himself, the attorney general took control of the Russian Federation probe out of the hands of a Trump loyalist, and handed it to Rod Rosenstein, where it remained until today.
Attorney General Jeff Sessions has resigned as the country's chief law enforcement officer at President Donald Trump's request. If Trump couldn't directly fire Sessions, he could at least make his life miserable, targeting him with a steady stream of gratuitous and belittling insults.
"Sessions should have never recused himself, and if he was going to recuse himself, he should have told me before he took the job and I would have picked somebody else", Trump told the New York Times in July 2017.
Son stars as Spurs sees off West Ham in Carabo Cup tie
Privately, Pellegrini has been trying to coax the best out of the player they called "Neymar's younger brother" back in Brazil.
If the firing was indeed done to place someone "adverse to the existence of the Mueller investigation" in charge who "wants to dry it up by the shrinking its budget, that would be an improper objective".
Others being considered include Kansas Secretary of State Kris Kobach, retiring Florida Attorney General Pam Bondi, Health and Human Services Secretary Alex Azar, former Attorney General William P. Barr and Trump personal attorney Rudy Giuliani, the Wall Street Journal reported.
Mr Rosenstein also has faced criticism from Mr Trump.
House Democratic leader Nancy Pelosi called it a "blatant attempt" to undermine the Russian Federation probe, while Senate Democratic leader Chuck Schumer tweeted that "clearly, the president has something to hide".
Trump said: "According to NBC News, Voters Nationwide Disapprove of the so-called Mueller Investigation (46%) more than they Approve (41%)".
Democrats, including House Democratic leader Nancy Pelosi and Senate Democratic leader Chuck Schumer, immediately called for Whitaker to recuse himself from the investigation, citing his public comments. Rep.